Compare two cars

Compare any two cars and get our Virtual Adviser™ opinion

Car #1
Make
Model
Variant
Engine
Car #2
Make
Model
Variant
Engine

compare selected cars
2006. - 2009.
S - Sports car
cabriolet, 2 door
rear
Badges
Production
Vehicle class
Body style
Wheel drive
Safety
2007. - 2009.
S - Sports car
cabriolet, 2 door
rear

Dimensons & Outlines

4091 mm
1781 mm
1299 mm
240 liters
260 liters
55 liters
Length
Width
Height
Boot (min)
Boot (max)
Fuel tank
4100 mm
1813 mm
1274 mm
66 liters
157 liters
52 liters
2006 BMW Z4 Roadster
2007 Opel GT

Engine

Petrol
6 - Inline, 4 valves per cylinder
Nat. Asp.
3246 cc
343 hp
365 Nm
Engine
Fuel
Configuration
Aspiration
Displacement
Power
Torque
Opel / General Motors
2.0 Z20NHH
Petrol
4 - Inline, 4 valves per cylinder
Turbo
1998 cc
264 hp
353 Nm

Performance (manual gearbox)

manual gearbox - 6 gears
1410 kg
5.0 s
250 km/h
18.2 l/100km
8.6 l/100km
12.1 l/100km
292 g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
manual gearbox - 5 gears
1306 kg
5.7 s
229 km/h
13.0 l/100km
6.9 l/100km
9.2 l/100km
218 g/km

Performance (automatic gearbox)

 
kg
s
km/h
l/100km
l/100km
l/100km
g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
 
kg
s
km/h
l/100km
l/100km
l/100km
g/km

Expenses

8790 EUR
Price from
7950 EUR

Virtual Adviser's™ opinion

Overview

Well, these are two pretty similar cars we have here! It's only details that could potentially make the difference. Considering they both belong to the sports car segment and utilize the same 2-door cabriolet body style and the rear wheel drive system, it all comes up to the specific petrol engine choice they offer. The first one has a BMW-engineered powertrain under the hood, a 6-cylinder, 24-valves 343hp unit, while the other one gets its power and torque from a 4-cylinder, 16-valves 264hp engine designed by Opel.

Safety

The fact that the BMW got tested by the European New Car Assessment Programme (Euro NCAP), while the other contender didn't, offers a slight advantage, as the 4-star rating is better than none. Still, apart from the official crash test results there are other things we need to be aware of. Both vehicles belong to the sports car segment, which is generally classifying them somewhere in the middle safety-wise, still it doesn't help us solve our dilemma, does it? Furthermore, taking kerb weight as an important factor into account, BMW Z4 offers a marginal difference of 8% more metal.

Reliability

Manufacturers have been building their reliability reputation for decades now and, generally speaking, it appears that Opel does have a slight advantage, when all the models are taken into account. These are the results of an independent reasearch, while our visitors describe reliability of BMW with an average rating of 4.3, and models under the Opel badge with 4.2 out of 5. Unfortunatelly, I don't have enough insight that would allow me to comment in more details on the specific models level. That apart, owners of different cars powered by the same engine as BMW Z4 rank it on average as 3.0 out of 5, exactly the same as the other one.

Performance & Fuel economy

BMW is a bit more agile, reaching 100km/h in 0.7 seconds less than its competitor. In addition to that it accelerates all the way to 250 kilometers per hour, 21km/h more than the other car. When it comes to fuel economy an obvious choice would be Opel GT, averaging around 9.2 liters of fuel per 100 kilometers (31 mpg), in combined cycle. That's 32% difference compared to BMW Z4!


Verdict

Opel appears just a bit more reliable, although the difference is truly marginal. The most important thing when deciding between any two vehicles should always be safety, both passive and active. In my opinion, everything taken into account, BMW Z4 beats the other contender by far, making it the best choice without even considering other things. It all continues in the same direction, with BMW offering somewhat better performance, just enough to call it quicker. It does come at a cost though, and that's the fuel consumption... At the end, as much as I'd like to give you a winner here, it's simply a pure tie if you ask me. Nevertheless, let's not forget that people have different preferences and needs, so what really counts is your personal feel. I'm only here to help. I suggest you spend two more minutes in order to find out which car, based on your needs and budget, would be picked by the virtual adviser, among more than 12.000 different ones in our database.

Check a car by its VIN number